1: <?php
  2: 
  3: namespace Psr\Log;
  4: 
  5: /**
  6:  * Describes a logger instance.
  7:  *
  8:  * The message MUST be a string or object implementing __toString().
  9:  *
 10:  * The message MAY contain placeholders in the form: {foo} where foo
 11:  * will be replaced by the context data in key "foo".
 12:  *
 13:  * The context array can contain arbitrary data. The only assumption that
 14:  * can be made by implementors is that if an Exception instance is given
 15:  * to produce a stack trace, it MUST be in a key named "exception".
 16:  *
 17:  * See https://github.com/php-fig/fig-standards/blob/master/accepted/PSR-3-logger-interface.md
 18:  * for the full interface specification.
 19:  */
 20: interface LoggerInterface
 21: {
 22:     /**
 23:      * System is unusable.
 24:      *
 25:      * @param string $message
 26:      * @param array  $context
 27:      */
 28:     public function emergency($message, array $context = array());
 29: 
 30:     /**
 31:      * Action must be taken immediately.
 32:      *
 33:      * Example: Entire website down, database unavailable, etc. This should
 34:      * trigger the SMS alerts and wake you up.
 35:      *
 36:      * @param string $message
 37:      * @param array  $context
 38:      */
 39:     public function alert($message, array $context = array());
 40: 
 41:     /**
 42:      * Critical conditions.
 43:      *
 44:      * Example: Application component unavailable, unexpected exception.
 45:      *
 46:      * @param string $message
 47:      * @param array  $context
 48:      */
 49:     public function critical($message, array $context = array());
 50: 
 51:     /**
 52:      * Runtime errors that do not require immediate action but should typically
 53:      * be logged and monitored.
 54:      *
 55:      * @param string $message
 56:      * @param array  $context
 57:      */
 58:     public function error($message, array $context = array());
 59: 
 60:     /**
 61:      * Exceptional occurrences that are not errors.
 62:      *
 63:      * Example: Use of deprecated APIs, poor use of an API, undesirable things
 64:      * that are not necessarily wrong.
 65:      *
 66:      * @param string $message
 67:      * @param array  $context
 68:      */
 69:     public function warning($message, array $context = array());
 70: 
 71:     /**
 72:      * Normal but significant events.
 73:      *
 74:      * @param string $message
 75:      * @param array  $context
 76:      */
 77:     public function notice($message, array $context = array());
 78: 
 79:     /**
 80:      * Interesting events.
 81:      *
 82:      * Example: User logs in, SQL logs.
 83:      *
 84:      * @param string $message
 85:      * @param array  $context
 86:      */
 87:     public function info($message, array $context = array());
 88: 
 89:     /**
 90:      * Detailed debug information.
 91:      *
 92:      * @param string $message
 93:      * @param array  $context
 94:      */
 95:     public function debug($message, array $context = array());
 96: 
 97:     /**
 98:      * Logs with an arbitrary level.
 99:      *
100:      * @param mixed  $level
101:      * @param string $message
102:      * @param array  $context
103:      */
104:     public function log($level, $message, array $context = array());
105: }
106: